Achieving visible-light-excited organic room-temperature phosphorescence by manipulating p–π conjugation. Issue 41 (11th October 2021)

• Record Type: Journal Article
• Authors: Xu, Qingyang; Ma, Liangwei; Sun, Siyu; Ma, Xiang
• Is Part Of: Journal of materials chemistry. Volume 9:Issue 41(2021)
• Page Start: 14623
• Page End: 14627
• Publication Date: 2021-10-11
• Subjects: Materials -- Periodicals; Chemistry, Analytic -- Periodicals; Optical materials -- Research -- Periodicals; Electronics -- Materials -- Research -- Periodicals; 543.0284
• DOI: 10.1039/d1tc04056a
• Languages: English
• ISSNs: 2050-7526

Abstract

Abstract : Achieving visible-light-excited room-temperature phosphorescence by changing the sizes of the heterocyclic ring to manipulate p–π conjugation in the molecular structure. Abstract : The development of organic room-temperature phosphorescence (RTP) materials has been a rich research field. However, there are still limited practical and directive strategies to regulate the phosphorescence emission. Herein, six naphthalene-based thiochromanone analogs with different heterocycles were synthesized. And all these molecules exhibited bright phosphorescence when embedded into a polyvinyl alcohol matrix under ambient conditions. The absorption spectra showed a distinct red-shift as the size of the heterocycle shrunk, which resulted from the facilitated p–π conjugation. In particular, the absorption spectra of molecules with a five-membered heterocycle were extended to visible light, which is rarely reported for RTP materials. These results might present a new strategy to adjust the photophysical properties of phosphors to obtain phosphorescence materials with the desired excitation and emission wavelength.